Trying to get pregnant for four months without sucess, i get my periods every month.what can i do to increase my fertility?

Patience & more sex!: You're not considered infertile until you've tried to get pregnant for at least 12 months w/o success. While prenatal vitamins won't increase chance of pregnancy, they can decrease risk of prenatal vitamins. Now is also a good time to see your family doc or OB for preconception counseling & to make sure you're as healthy as possible. Good luck!